The mobile charging robot is a multi axis robotic arm that can move independently and accurately insert the charging gun into the charging port of a new energy electric vehicle to be charged, automatically completing the insertion and charging. The entire process does not require human intervention, and the robot will be equipped with a large number of cameras, LiDAR, and ultrasonic sensors, enabling it to automatically find cars and avoid obstacles near the parking lot without colliding with other vehicles. When the car owner parks the electric car in a public, home, or workplace parking lot, the user places an order or scans the code through the app, and the mobile charging robot will move to the location where the electric car is located through GPS and automatically charge it. After the charging process is completed, the mobile charging robot will continue to use the next user or return to its base station to replenish its own battery. In addition, robots with different capacities such as 30kwh, 50kwh, and 60kwh are provided according to different user charging needs.